Marseille hosted Monaco in the 27th week of Ligue 1.
Gelson Martins scored the winning goal in the 58th minute for the visiting team.
National football player Cengiz Ünder, who played in Marseille, was not included in the match squad due to his injury.
With this score, Marseille dropped to 3rd place with 47 points. Monaco, on the other hand, increased its score to 41 and placed 8th.